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what is set - builder form and roster form

what is the formula of n(A-B) and n(B-A)

## What will be the best reference books for class 11 cbse?

can anyone provide me with class 11 c++ sumita arora solutions

write in set builder form

{-4,4}

prove A-B = A intersection B complement

A and B are two sets then prove that A minus B union B is equal to A union B.

prove that (A-B) U (B-A) =(A U B) - (A intersection B)

Two finite sets have m and n elements. The total number of subsets of the first set is 112 more than the total number of subsets of the second set. Find the valuesof m and n.If x belongs to A and A belongs to B, then x Belongs to B? Determine whether true or false and explain.

answer is:-

False, Consider A = {{1},2}

clearly, 1belongs to A and A belongs to B but 1 doen't belong to B

So, x belong to A and A belongs to B need not imply that x belongs to B.

SIr Please explain and give suitable example to make me understand.In a survey of 100 students, the number of students studying the

various languages were found to be English only 18, English but not

Hindi 23, English and Sanskrit 8, English 26, Sanskrit 48, Sanskrit and

Hindi 8, Number of no language 24. Find

i) How many students were studying Hindi?

ii) How many students were studying English and Hindi ?

1.A survey of 500 television viewers produced the given information;285 watch football;195 watch hockey;115 watch cricket;70 watch football and hockey;45 watch football and cricket ;50 do not watch any of three games.How many watch exactly one of the three games ?

how to proof de morgan's law step wise

In an exam, 80% passed in math, 72% passed in science, and 13% failed in both, If 312 students passed in both the subjects. Find the total number of students who appeared in the exam.

What is an arbitrary element of a set? Explain.

what is the formula for n(AUBUCUD) /

[5,7,11,13,17] ........describe this in set builder form

If A and B be two sets containing 3 and 6 elements respectively, what can be the minimum number of elements in A ∪ B ? Find, also the maximum number of elements in A ∪ B ?

prove that :

A-(BnC)=(A-B)U(A-C)

Draw Venn diagrams of :-

1. A-(BUC)

2.AU(B∩C)

a college awarded 38 medals in football,15 in basketball and 20 in cricket . if these medals went to a total of 58 men and only 3 men got medals in all three sports ,how many received medals in exactly 2 of the sports

In a school there are 200 students. 100 play cricket, 50 play hockey and 60 play basketball.30 students play both cricket and hockey, and 35 play both hockey and basketball. 45 play both basketball and cricket.

Find Out:-

a.)What is the maximum number of students who play at least one game?

b.)What is the maximum number of students who play all the three games?

c.)What is the minimum number of students playing atleast one game?

d.)What is the number of student playing all the three games?

if A intersection B dash is equal to null set, then show that A is equal to A intersection B, and hence show that A is a subset of B. please help.

Show that AUB(A union B) = A Intersection B implies A=B.

Let A ={x:x

^{3}+1=0};B={x:x^{2}-x+1=0} .Find A(intersection) B when (i) x is real (ii) x is not real.n1. In a town of 10,000 families it was found that 40% families buy newspaper A, 20% families buy newspaper B and 10% buy C. 5% buy AB, 3% buy BC and 4% buy AC. If 2% families buy all the three, find the number of families which buy i) A only ii) B only iii) none of A,BC.

a survey shows that 63% of americans like cheese whereas 76% like apples.If x% of americans like both cheese and apples,find the value of x.

rnplz explain in very a easy step.....

3.In a survey of 25 students, it was found that 15 had taken mathematics,12 had taken Physics and 11 had taken chemistry.5 had takenMathematics and Chemistry,9 had taken mathematics and Physics,4 had taken Chemistry and Physics and 3 had taken all the three subjects. Find the number of students that hadprove that A intersection (B-C) = (A intersection B) - (A intersection C)

sir can you prove the de morgan's law using venn diagram?

plz answr urgently -

A set of all integers greater than 5 and less than 9represent in set builder form,so can we write it as:-

{x : x∈Z, 5<x<9 }

7. In a survey of 100 people it was found that 28 read magazine A, 30 read magazine B, 42 read magazine C, 8 read magazines A B, 10 read magazine AC 5 read magazine B and C and 3 read all the three. Find:i) How many read none of the magazines?ii) How many read magazine C only?

write the set in set builder form S=( 1,3,9,27)

## Best books for cbse class 11 commerce students?

suppose A

_{1}, A_{2},....,A_{30}are 30 sets each with 5 elements and B_{1}, B_{2},...., B_{n}are n sets each with 3 elements. let union ofA_{1}, A_{2},....,A_{30}= union ofB_{1}, B_{2},...., B_{n}=S. Each element of S belongs to 10 of A's and 9 of B's. find n.WHAT DOES IT MEAN????????????

wat are d uses of sets in our daily life?

state whether true or false? {a} belongs to { a,b,c} pls explain your answer.

IN A TOWN OF 10,000 FAMILIES IT WAS FOUND THAT 40% FAMILIES BUY NEWSPAPER A, 20% FAMILIES BUY NEWSPAPER B , AND 10% FAMILIES BUY NEWSPAPER C, 5% FAMILIES BUY A AND B , 3% BUY B AND C AND 4% BUY A AND C .IF 2% FAMILIES BUY ALL THE NEWSPAPERS FIND THE NUMBER OF FAMILIES WHICH BUY

1. A ONLY 2. B ONLY 3. NONE OF A ,B , AND C.

IF P(A)=P(B) SHOW THAT A=B

Hi

Prove That : cos6A = 32cos^6A - 48cos^4A + 18cos^2A - 1.

There are 20 students in a chemistry class and 30 students in a physics class. find the number of students which are either in physics or in chemistry class in the following cases:

a)two classes meet at the same hour. (hint: n(C∩P) =Φ)

b)The two classes meet at different hours and 10 students are enrolled in both the courses. (hint: n(C∩P)=10)

In a survey of 400 students in a school ,100 were listed as taking apple juice ,150 were listed as taking orange juice and 75 were listed as taking both apple as well as orange juice .Find how many students were taking neither apple juice nor orange juice.

Example 1:In a survey, 150 people liked winter, 200 liked summer and 50 liked both summer and winter. Find the number of people who liked

I did not understand this questions solutionWinter but not summer

A= (A−B) ∪ (A∩B)n(A) =n(A−B) +n(A∩B)n(A−B) =n(A) −n(A∩B)= 150 − 50

= 100

Thus, the number of people who like winter but not summer is 100.

Verify De Morgan's law by using venn's diagram.

which of the following statements is incorrect?

show me how they are and how they are not ..a and b are two sets such that

n(a-b)=20+x

n(b-a)=3x

n(a∩b) =x+1 if n(a)= n(b)

the value of x

According to this definition, B is an empty set while A is not an empty set set is denoted by the symbol ϕ or {}.

We have below a few examples of empty set.

(ii) B = {

x:x^{2}– 2 = 0 andxis rational number}. Then B is the empty set the equationx^{2}– 2 = 0 is not satisfied by any rational value ofx.show that if ais A subset B,Then C-B is subset of C-A

Q1if A,B,C are three sets then proove that A∩(BC)=(A∩B)(A∩C)

Q2let A,B, and C be the sets such that AUB=AUC and A∩B=A∩C show that B=C

Let A,B,and C be the sets such that AUB

= AUC and A intersection B and A intersection B = A intesection C show that

B=C

(

A-B) U (B-C)How do we prove it without using the Venn diagram?

In a beauty contest, half the number of judges voted for Miss A, 2/3 voted for Miss B, 20 voted for both and 6 did not vote for neither Miss A nor Miss B. Find how many judges , in all, were present there?

bhak ye sab kya satta batta kar raha hai?

in an examination 80% students passed in mathematics,72% passed in science and 13% failed in both subjects.If 325 students passed in both subjects,find the total number of students who appeared in the examination.

In a class 18 students took physics, 23 took chemistry, 24 took maths, out of them 13 took chemistry and mathematics, 12 took physics and chemistry, 11 took physics and mathmetics. if 6 were offered all the three subjects find :

1. Total number of students in class

2. How many took maths but not chemistrty

3. How many took exactly one of the three subjects

How can we write the set builder form for fibonacci series

What is the difference between

andbelongs to?subsetA*B = $\left(A\cap B\right)\cup \left(\left(X-A\right)\cap \left(X-B\right)\right).$

Then only one of the following statements is true. Which one is it?

A. A*(X-B) $\subset $A*B and A *(X-B) $\ne $ A*B

B. A*B = A*(X-B)

C. A*B$\subset $(X-B) and A*B $\ne $ A*(X-B)

D. X - (A*B) = A*(X-B)

has a probe which can test combinations without typing them on

the safe. The probe responds Fail if no individual digit is correct.

Otherwise it responds Close, including when all digits are correct. For

example, if the correct code is 014, then the responses to 099 and 014

are both Close, but the response to 140 is Fail. If Alex is following an

optimal strategy, what is the smallest number of attempts needed to

guarantee that he knows the correct code, whatever it is? No links

in a class of 60 students,23 play hockey,15 play basketball,20 play cricket and 7 play hockey and basketball,5 play cricket and basketball,4 play hockeyand cricket,15 do not play any of the three games. find the number of students who

1- play all the three games

2-play hockey but not cricket

3-play hockey and cricket both,but not basketball

Out of a group of 20 teachers in a school, 10 teach Mathematics ,9 teach Physics and 7 teach Chemistry. 4 teach Mathematics and Physics but none teach both Mathematics and Chemistry . How many teach Chemistry and Physics ? How many teach only Physics ?

Out of 2000 employees in a office 48 % preferred cofee, 54% liked tea , 64% used to smoke . Out of th etotal employee 28% used cofee and tea , 32% used tea and smoke and 30% prefered cofee and smoke and only 6% did none of these . The number having all th ethrree is ?

given that 7 element set a = 1234567 find the collection of t of 3 elements subset of aA such that each pair of element a occurs exactly in one the subset of T

what is set ?

Using properties of sets prove the statements given:-

(i) For all sets A and B, AU(B-A) = AUB

(ii) For all sets A and B, A-(A-B) = AintersectionB

(iii) For all sets A and B, (AUB)-B = A-B

what is an improper subset?

in a class of 25 student , 12 have taken maths,8 have taken maths but not biology.find the number of student who are taken maths and biology and the number of those who have taken biology but not maths .each student have taken either maths or biology or both?

(a)A-B

(b) A

(c) B

(d) (AUB)-B

Two finite sets have m and n elements. The total no. of subsets of the first set is 56 more than that of the total no. of subsets of the second set. Find the values of m and n.

At a certain conference of 100 people there are 29 Indian women and 23 Indian men . Out of these Indian people 4 are doctor and 24 are either men or doctors . There are no foriegn doctors. The number of women doctors attending the conference is ?

draw venn diagram for :- a) A intersection ( B U C ) b) A U ( B-C)